Brett Prebble and Douglas Whyte look set to go toe-to-toe once again in tonight's Happy Valley Jockey Challenge, but an extra ride for Prebble swings the balance in his favour at $2.65.

Whyte was last night posted a narrow $2.50 favourite in the opening market, one turn of the board ahead of Prebble.

Both have undeniable claims but, with one more scoring opportunity in his favour, Prebble looks the man to beat at the city track he has dominated in recent seasons.

Mustang and Tout Va Bien give Prebble the chance to get off to a flying start, as both have been knocking on the door in early runs this season. Debutant Snitzel Kid is an interesting chance in race three, but the Caspar Fownes-trained runner must overcome the horror 12 barrier to prove his ability first-up.

His two trials have been solid, without much being asked, but it is his barrier trial form from Australia pre-import that catches attention. Snitzel Kid finished two lengths behind General Truce and Secession - gallopers who have both won black-type two-year-old events in Melbourne.

However, it is My Way, Royal Pumpkin, Hold Hands and Windicator Returns form the body of Prebble's point-scoring opportunities, and should ensure Whyte will need plenty of points of his own if he is to overcome his nemesis.

Bundle O'Gold wraps up the meeting for Prebble, and that's exactly what his Challenge backers can expect to collect at 11pm this evening.